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A Review of Software for Sample Size DeterminationVirginia Commonwealth University, pdattalo{at}vcu.edu The size of a sample is an important element in determining the statistical precision with which population values can be estimated. This article identifies and describes free and commercial programs for sample size determination. Programs are categorized as follows: (a) multiple procedure for sample size determination; (b) single procedure for sample size determination; and (c) Web-based. Programs are described in terms of (a) cost; (b) ease of use, including interface, operating system and hardware requirements, and availability of documentation and technical support; (c) file management, including input and output formats; and (d) analytical and graphical capabilities.
Key Words: power analysis sample size effect size power analysis software sample size software
This version was published on September
1, 2009 Evaluation & the Health Professions, Vol. 32, No. 3,
229-248 (2009) |
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